Ratingagenturen unter Beschuss
Die Häufung von Ausfällen im US-Subprime-Sektor zieht eine Welle von Herabstufungen durch die Ratingagenturen nach sich. Das Vertrauen in die Ratings ist erschüttert, und die Agenturen sind bei den Investoren und Aufsichtsbehörden unter Beschuss geraten. Ist die Kritik gerechtfertigt? Mark Pengelly berichtet
Die Ratingagenturen stehen im Kreuzfeuer. Angesichts der massiven Häufung der Ausfälle bei US-Hypotheken geringer Bonität (Subprime) sahen sie sich seit Juli zu Unmengen von Neubewertungen veranlasst. Bisher wurden hunderte RMBS (Residential Mortgage-backed Securities) und CDO-of-ABS (Collateralised Debt Obligations of Asset-backed Securities) herabgestuft - darunter auch einige mit AAA bewertete Tranchen. Und weitere werden folgen. Durch diese Maßnahmen ist das Vertrauen in die Verlässlichkeit
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